Notification Email Content Type

Hi,

I would like to send my notification emails as text/plain however the code in default_api.php sets the content type to ‘text/html’. Would it be possible to make this an option or filter?

For example, this would be great in default_api.php line 519:

add_filter( 'wp_mail_content_type', create_function( '', 'return "'.apply_filters( 'wp_crm_mail_content_type', 'text/html' ).'"; ' ) );

This would let the default content type be overwritten by the wp_crm_mail_content_type filter.

Thanks!

https://wordpress.org/plugins/wp-crm/